The French plural of 'eau' meaning waters, often used in English in phrases like 'eaux de vie' (brandy) or 'eaux de toilette' (light perfume).
From Old French 'eau,' derived from Latin 'aqua' meaning water. The French plural form 'eaux' is used in English when referring to French beverages or perfume products.
English borrowed this French word because France became famous for perfumes and brandies, so we kept their plural form rather than making it 'waters' — it sounds fancier and reminds us of French luxury.
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